DT125R FORUM

My powervalve would go through the cleaning process but not move once the bike was started. Got another cdi unit and it then worked great so I would go for a cdi unit. When I started mine it went to the close position and stayed there no matter how much I revved it.

@calum that's good. Glad someone does

@calum thanks. Yeah sad really. Won't be many around after another 10 years.

Problem solved. It was the cdi unit. Changed that and it runs like a dream. Thought I'd let everyone know as sometimes people get it fixed and you never hear the outcome

I guess it's ok as it ran great with the power valve working spot on for a few weeks. Just got a cdi off eBay and a servo so will try the cdi first and see if it fixes it.

@mitch_350z I see. Where is the resister?

@mitch_350z the one below. Br9eix.

@mitch_350z iridium spark plug

@jens-eskildsen ok thanks mate. Very helpfull
Will try another servo then and see what happens.

@calum yeah I guess they are.apart from that it runs lovely. Will change the servo. If that doesn't do it just the cdi left I guess.

Took the exhaust off. A bit dirty in there but rotates easy enough. Goes through the cleaning process nice and easy so all I can do now is change the servo and hope it sorts it.

@calum ok thanks for the help. With give it a go.

@calum do you have a link for how to remove power valve at all?

@calum it could possibly be gunked up but would it not move when you turn the ignition on?

Forced the valve open while engine running and goes like stink top end. Have noticed since I done that and tuned the ignition off and on and start engine it starts to move as it should for a few revs then stops moving again. I'm taking a guess it's the solenoid?

@declan cogs are fine as just changed the chain so checked them both.

@declan I did go over the connections the weekend. Some were a bit crappy so wire brushed them unless the connections are a bit dry. Didn't have any maintenance spray but will give them another clean now I have some. Would the servo make it go like that do you think?

Hi peeps. I have A 2006 dt x sm. The issue is the power valve does it's cycle when ignition is put on but when I start the engine
it goes to the right slightly as it should I think but from there on it doesn't move at all even when revving it high. Any ideas? Havnt had the bike long. Did work well for a few weeks then occasionally but now doesn't work at all in high revs.

Any news on this thread? Did the new servo sort it as mine does the same thing.